Sawmill-feed.



No. 687,309. Patented Nov. 26, I90l. G. L. HEMPY.

SAWMILL FEED.

[Application'filed Apr. 15, 1901.)

(No Model.)

In: cams runs 00, PNOTOLWHOW WASHINGTON, D,

NITED TATES PATENT Fries.

enoaenjn HEMPY, or naronorno.

-' SAWMILL-FEED.-

srEcIFIcA'rIoN Application filed April 15, 1901. Serial No. 55,908. (NoinodeL) To all whom it mag concern.-

Be it known that I, GEORGE L. HEMPY, a citizen of the United States, residing at Brice, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Sawmill-Feeds; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. A

The invention relates to sawmillfeeds; and the particular object in view is to provide a device of this character which shall be simple of construction, durable in use, and comparatively inexpensive of production and which will reduce to a minimum the end thrust on the saw-mandrel, which causes the heating of the journals and the saw, which for obvious reasons is very detrimental.

With this and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, which will be hereinafter more fully described,and particularly pointed out in the appended claim.

Figure 1 is a top plan View of my improved sawmill-feed. Fig. 2 is a front view of my improved master friction-wheel, and Fig. 3 is a vertical sectional view.

In the drawings, 1 denotes the frame of the sawmill-feed, consisting of the side pieces 2, the end pieces 3, and the longitudinal center piece 4. v

5 denotes a saw-mandrel journaled in bearings 6, supported by the side pieces 2 and provided at one end with a circular saw 7 and at its opposite end with a drive-pulley 8.

9 denotes a shaft suitably journaled to the frame and having at one end a pinion 10, which is adapted to engage with the sawmillcarriage to move it toward and away from the saw.

11 denotes the master friction-wheel,which is splined to the mandrel 5 to rotate therewith and move longitudinally thereon andis provided with a beveled'rim 12 in the fiat vertical friction-face 13.

14 denotes a suitably-j ournaled shaft which extends at right angles to the mandrel 5 and is provided at one end with a friction-gear 15, which is adapted to mesh with the friction-rim 12 of the master-wheel 11,and is provided at its opposite end with a beveled pinion 16, which isadapted to mesh with the beveled gear 17, secured to the end of the shaft 9, thus transmitting motion from the mandrel 5 to the shaft 9 to return the logcarriage. v

I will now proceed to describe the means employed for sliding the master-wheel 11 upon its mandrel 5 for throwing the wheel into and out of' engagement with the bevelgear 15.

18 denotes a crank-shaft suitably journaled in bearings secured to one of the end pieces 3 of the frame and provided with an operat ing-handle 19. a

2O denotes a bell-crank lever secured to one of the side pieces 2 of the frame and having one limb connected to the crank of the crankshaft 18 by a link 21.

22 denotes a lever having one end pivoted to a bracket 23, secured to the main frame and pivoted to a trunnion-yoke 24, loosely journaled on the hub 25 of the wheel 11 and having its other end connected by a link 26 to the limb 27 of the bell-crank lever 20. By rocking the handle 19 the wheel 11 will be slid upon the mandrel 5 to throw it into and out of gear with the bevel-gear 15.

The following mechanism is employed for moving the log-carriage toward the saw with variable speeds: This mechanism consists of a frictional wheel 28, mounted upon a shaft 29, suitably journaled to the main frame. The wheel 28 is splined to said shaft to rotate therewith and move longitudinally thereon. This Wheel 28 has its periphery in close proximity to the vertical flat side of the wheel 11 and is adapted to be brought into contactwith said Wheel when the same is moved to the right by the operating-handle 19. The wheel 28 is provided with a hub, to which is secured a trunnion-yoke 29, similar in construction to the one connected to the hub of the wheel 11, and to this trunnion-yoke is pivoted a bar 30, which has its opposite end pivoted to a link 31, which in turn is pivoted at 32 to the central longitudinal piece 4 of the main frame.

33 denotes a rod having one end pivoted to the bar 30 and its other end projecting through a bearing 34, secured to the main frame and threaded to receive a hand-nut 35,

by means of which the rod 33 is moved 1ongitudinally to move the wheel 28 toward or away from the axis of the wheel 11 to increase or diminish the speed of the log-carriage.

The shaft 29 is provided with a bevel-pinion 29, which meshes with a bevel-gear 29 secured to the shaft 9, thus transmitting motion from the shaft 29 to the shaft 9.

In operation, to feed the log to the saw, the handle 19 is operated to throw the wheel 11 into engagement with the wheel 28. To increase or diminish the speed of the carriage, the hand-nut is operated to move the wheel 28 from or toward the axisof the wheel 11. When it is desired to return the log-carriage, the handle 19 is operated to move the wheel 11 from engagement with the wheel 28 and into engagement with the wheel 15, thus reversing the movement of the shaft 9.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operation, and advantages of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and details of construction may be made within the scope of the invention without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

In a sawmill-feed, the combination with the main frame, of a saw-mandrel journaled therein, a master-wheel splined thereto to move longitudinally thereon and rotate therewith and provided with a beveled periphery and with a vertical flat side, a transverse shaft adapted to be geared with the log-carriage and provided at one end with two beveled gears, two parallel shafts extending at right angles to the mandrel, one of which is provided with a beveled gear adapted to engage the beveled periphery of themaster-Wheel and with a beveled gear adapted to engage one of the beveled gears of the transverse shaft, and the other shaft of which is provided with a friction-wheel splined to rotate with said shaft but free to slide thereon and adapted to be brought into contact with the vertical flat face of the master-wheel and provided with a beveled gear adapted to mesh with the other beveled gear of the transverse shaft, a bar loosely connected to the frictionwheel and connected by a link to the main frame, a rod pivoted at one end to said bar and having its opposite end journaled in the main frame and screw-threaded, a hand-nut mounted upon the screw-threaded end of said rod, a crank -shaft journaled to the main frame and provided with anloperating-handle, a bell-crank lever pivoted to the main frame, a lever pivoted to a bracket secured to the main frame 'and having a loose connection with the master-wheel, a link connecting one limb of the bell-cranklever with said pivoted lever, and a link connecting the other limb of the bell-crank lever with the crank-shaft, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEO. L. HEMPY. Vitnesses:

FLORA A. HEMPY, MARY VANDANA. 

